\begin{tabular}{l*{5}{c}} \toprule 
& \multicolumn{2}{c}{\textbf{Yellow}} & \multicolumn{2}{c}{\textbf{Green}} \\
& \multicolumn{1}{c}{\textbf{Vaccine 4}} & \multicolumn{1}{c}{\textbf{Vaccine 5}} & \multicolumn{1}{c}{\textbf{Vaccine 4}} & \multicolumn{1}{c}{\textbf{Vaccine 5}} \\
                    &\multicolumn{1}{c}{(1)}         &\multicolumn{1}{c}{(2)}         &\multicolumn{1}{c}{(3)}         &\multicolumn{1}{c}{(4)}         \\
\midrule
Signal at 4         &      -0.046         &      -0.092\sym{***}&       0.108\sym{***}&       0.221\sym{***}\\
                    &     (0.032)         &     (0.034)         &     (0.037)         &     (0.037)         \\
 
Signal at 5         &       0.237\sym{***}&      -0.022         &      -0.185\sym{***}&       0.130\sym{***}\\
                    &     (0.030)         &     (0.036)         &     (0.025)         &     (0.043)         \\
 
UI Group mean       &       0.284         &       0.200         &       0.243         &       0.162         \\
Observations        &        1866         &        1146         &        1866         &        1146         \\
p-value S4          &       0.156         &       0.008         &       0.004         &       0.000         \\
p-value S5          &       0.000         &       0.550         &       0.000         &       0.004         \\
p(S4 = S5)          &       0.000         &       0.046         &       0.000         &       0.049         \\
Controls            &         Yes         &         Yes         &         Yes         &         Yes         \\
\bottomrule \end{tabular}
